Lock



v Nw., g, 1935.

D. NlcoLs LOCK Filed Jan. 9, 1934 lNVE NToR NIC: HIGDLS Nl-:v5.-

Patented Nov. 19, 1935 UNITED STATES PATENT OFFICE V LOCK Domenic Nicols, Los Angeles, Calif.

Application January 9, 1934, Serial No. 705,920

1 Claim.

This invention relates to improvements in locks.

The principal object of this invention is to produce a lock which is simple in construction, neat in appearance and economical to manufacture.

A further object is to produce a lock which has all the appearances of an ordinary catch.

A still further object is to produce a device of this character which is simple in construction, economical to manufacture and highly efficient in use.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specication and in which like numerals are employed to designate like parts throughout the same,

Figure l is a plan View of my lock as the same would appear attached to a door and the jam thereof,

Figure 2 is a top plan view of Fig. 1,

Figure 3 is a cross-sectional view of Fig. 2 taken on the line 3--3 of Fig. l, on an enlarged scale,

Figure 4 is an edge view of the keeper plate, a portion thereof broken away,

Figure 5 is an edge View of the lock proper, a portion thereof being broken away, and

Figure 6 is a rear elevation of the lock in open i position.

Many petty thefts occur through the fact that a person will enter where the lock is merely a latching arrangement, whereas if the lock had really prevented easy entrance, the thief would not have taken the risk of breaking in.

Applicant has therefore devised a latch arrangement which is virtually a lock, although the same has all the appearances of an ordinary latch.

In the accompanying drawing wherein for the purpose of illustration is shown a preferred embodiment of myinvention, the numeral 5 designates a plate which is attached to the door jam by the employment of screws passing through openings f5. This plate is so formed as to slide into a dovetailed slot 'I formed in the keeper 8. This keeper has an opening 9 to receive the bolt and also a slot I I, the purpose of which will be later seen. Attached to the door is a plate I2, attached thereto thru the medium of screws I3. This plate has undercut portions I4 upon its opposite edges, stops being formed at I6, the purpose of which will be later seen. The numeral I'I designates the cover of the lock which is provided with a groove capable of engaging the undercut edges I4 of the plate I2. Slidably mounted within the casing II is a bolt I8 which is actuated by a thumb piece I9 and has a spring 2|, which normally tends to hold the bolt in extended position. Formed upon the casing I'I is a tongue 22, which tongue 22 is adapted to enter the slot I I in a manner to be hereinafter described. The operation of my device is as follows:

Assuming the plate 5 has been attached to the door jam, as shown in Fig. 3, the keeper 8 is slid onto the plate toward the left of the drawing, as shown in Fig. 1. The plate I2 is now attached to the door with the stops I6 at the lower portion of the plate. The casing I'I is now slid from the top downwardly over the plate I2 to the position indicated. This action will bring the tongue 22 to a point below the keeper 8. Assuming that the door is now closed the casing Il may now be pushed upwardly to the position of Fig. 1, the tongue 22 will enter the slot II in the keeper and the bolt I8 will enter the opening 9 in the keeper, thus locking the casing against further movement. A person not understanding the arrangement can therefore move the bolt through the medium of the finger piece I9 as much as desired, but the tongue will prevent swinging of the door through its engagement with the slot I I. When it is desired to open the door, the thumb piece is moved to retract the bolt I8 and the casing is moved downwardly to the broken line position of Fig. l, after which the door may be swung. It is o-i` course understood that there will be stops so formed on the casing which cooperate with the stops Iii to prevent the casing from passing downwardly upon the plate i2, beyond a predetermined position. These stops `are shown .at 23 in Fig. 6.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjomed claim.

Having thus described my invention, I claim:

therein, said casing having a tongue formed thereon, said tongue entering said slot when said casing is moved longitudinally and in a plane parallel to the end of said keeper.

DOMENIC NICOLS. 

